CN106525576A - Embedded concrete shear stress sensor - Google Patents
Embedded concrete shear stress sensor Download PDFInfo
- Publication number
- CN106525576A CN106525576A CN201611048535.1A CN201611048535A CN106525576A CN 106525576 A CN106525576 A CN 106525576A CN 201611048535 A CN201611048535 A CN 201611048535A CN 106525576 A CN106525576 A CN 106525576A
- Authority
- CN
- China
- Prior art keywords
- shear stress
- sensitive beam
- baffle plate
- upper shell
- stress sensor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000463 material Substances 0.000 claims description 13
- 229910001220 stainless steel Inorganic materials 0.000 claims description 8
- 239000010935 stainless steel Substances 0.000 claims description 8
- 238000003466 welding Methods 0.000 claims description 6
- 239000013307 optical fiber Substances 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 8
- 238000010008 shearing Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
- G01N3/066—Special adaptations of indicating or recording means with electrical indicating or recording means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
- G01N3/068—Special adaptations of indicating or recording means with optical indicating or recording means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0025—Shearing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0617—Electrical or magnetic indicating, recording or sensing means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0641—Indicating or recording means; Sensing means using optical, X-ray, ultraviolet, infrared or similar detectors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
Abstract
The invention discloses an embedded concrete shear stress sensor. The embedded concrete shear stress sensor comprises an upper shell and a lower shell, wherein a groove is respectively formed around the interface of the upper shell and the lower shell; a soft rubber layer for connecting the upper shell and the lower shell is arranged in the groove; a sensitive beam is arranged at the lower part of the upper shell, a grooved baffle plate is arranged at the upper part of the lower shell, a sliding chute is formed in the grooved baffle plate, and one end of the sensitive beam is positioned in the sliding chute of the grooved baffle plate; a strain sensitive element for sensing deformation of the sensitive beam is arranged on the sensitive beam; and the strain sensitive element is connected with a subsequent measuring circuit through a lead to achieve the purpose of measuring the strain of the sensitive beam. By embedding the shear stress sensor in concrete, the shear stress in the concrete can be measured, thereby solving the problem of direct measurement of a shear stress in a concrete structure.
Description
Technical field
The invention belongs to field of sensing technologies, more particularly to a kind of embedded type concrete shear stress sensor.
Background technology
The stress state of xoncrete structure is the important parameter for reflecting its safety, therefore the stress to xoncrete structure is surveyed
Amount is concrete structure model experimental study and the important content in field monitoring.At present, xoncrete structure tests normally only office
Be limited to the measurement of the physical quantitys such as load, displacement, strain, and the measurement to stress is by resistance being pasted in concrete structural surface
Then foil gauge obtains concrete by the elastic modelling quantity conversion of the concrete material estimated measuring the strain of concrete surface
The stress on surface, this method cannot obtain the accurate stress state of inside concrete.For this kind of heterogeneous material of concrete,
Power-deformation relationship generally on macro-level does not ensure that theory analysis and concordance of the result of the test on internal force level,
Even if the load-strain curve of body structure surface is identical, but its component internal force distribution may very different.Therefore, design a kind of
Sensor realizes measurement to internal force on structural key section, for xoncrete structure non-linear force behavior research provide according to
According to being one of important research task of structural test technology.
The internal force of xoncrete structure includes compressive stress, tension and shear stress etc., and the shearing strength of concrete material is low, by
The failure by shear that shear stress causes is to cause in civil engineering the xoncrete structures such as friction pile, retaining wall, support beam to occur to damage
The key factor of destruction, therefore, the shear stress under working condition inside xoncrete structure is measured for xoncrete structure to pass
Important, exploitation can be embedded in inside concrete, significant for inside concrete shear stress sensor measured directly.
The content of the invention
It is an object of the invention to provide it is a kind of measurement concrete in shear stress sensor so as to simple structure, can
Embedded the advantages of.
The purpose of the present invention can adopt the following technical scheme that to realize：A kind of described embedded type concrete shear stress sensing
The interface of device, including upper shell, lower house, described upper shell and lower house is respectively arranged with groove in one week, in groove
It is provided with for connecting the software glue-line of upper and lower casing；The bottom of described upper shell is provided with sensitive beam, the top of lower house
Grooved baffle plate is provided with, chute on described grooved baffle plate, is provided with, one end of sensitive beam is located in the chute of grooved baffle plate；Institute
State and be provided with sensitive beam for perceiving the strain sensor that sensitive beam deforms；Described strain sensor by lead with
The measurement of sensitive beam strain is realized in follow-up measuring circuit connection.
Described sensitive beam is made up of stainless steel material, generally strip, and one end of sensitive beam can pass through the side of welding
Formula is connected with upper shell.
There is certain interval between this end face and chute bottom in described sensitive beam insertion chute.
Described upper shell and lower house are made up of stainless steel material, and monnolithic case is square, or and it is circular.
Described grooved baffle plate is made up of stainless steel material, and grooved baffle plate can be connected with lower house by way of welding,
The width of chute thereon is consistent with sensitive beam, and ensures that sensitive beam can be moved along the length direction of groove,
Described sensitive beam and grooved baffle plate collective effect can guarantee that the sensor is only sensitive to the shear stress in a direction, i.e., when
Sensor is subject toxDuring the shear stress of direction, sensitive beam deforms, and works as which and be subject to orthogonal direction（yDirection）It is during shear stress, quick
Sense beam is only moved in chute, and sensitive beam is indeformable.
Described strain sensor can adopt strain ga(u)ge or optical fiber Bragg raster.
In shear stress sensor Transducers Embedded in Concrete of the present invention, when sensor is acted on by shear stress in a direction
When making sensor upper shell and lower house that the shearing changing of the relative positions to occur, the sensitive beam for inside setting deforms, strain sensor thereon
Output signal after deformation is perceived, detection output signal is the measurable shear stress for obtaining the direction in concrete.The present invention can
The direct measurement of shear stress in concrete is realized, be can be used for experimental study of the xoncrete structure by failure by shear, solved engineering existing
A difficult problem for shear stress test in the monitoring of field.
Description of the drawings
Fig. 1 is the cross-sectional view of the shear stress sensor of the present invention.
A-A views of the Fig. 2 for Fig. 1.
B-B views of the Fig. 3 for Fig. 1.
Fig. 4 is the schematic diagram of shear stress on certain section in solid.
In figure：1st, upper shell, 2, lower house, 3, sensitive beam, 4, grooved baffle plate, 5, strain sensor, 6, software glue-line,
7th, lead.
Specific embodiment
Below in conjunction with the accompanying drawings the present invention is elaborated.
As shown in Figure 1, Figure 2 and Figure 3, a kind of embedded type concrete shear stress sensor disclosed by the invention, including upper casing
Body 1, lower house 2, sensitive beam 3, grooved baffle plate 4, strain sensor 5, software glue-line 6 and lead 7.Upper shell 1 and lower house 2
Interface arranges groove, fills connection by software glue-line 6.Sensitive beam 3 is set on the inside of upper shell, the inner side of lower house 2 sets grooved
Baffle plate 4, one end of sensitive beam 3 are inserted in the chute of grooved baffle plate 4, and this end face and chute in the insertion chute of sensitive beam 3
There is certain interval between bottom.Strain sensor 5 is set in sensitive beam 3, the deformation of beam is perceived, strain sensor 5 passes through
Lead 7 is connected the measurement for realizing beam strain with follow-up measuring circuit.By in described shear stress sensor Transducers Embedded in Concrete, work as biography
Sensor when a direction is subject to shear stress effect to make sensor upper shell 1 and lower house 2 that the shearing changing of the relative positions to occur, the sensitivity for inside setting
Beam 3 deforms, and strain sensor 5 thereon perceives output signal after deformation, and detection output signal is measurable being mixed
The shear stress of the direction in solidifying soil.Described upper shell 1 and lower house 2 adopt stainless steel material, profile to be square,
Can be circle, the present embodiment is square.Described software glue-line 6 adopt silica type material, with shear strength it is low the characteristics of,
On the one hand play connection and sealing effect, on the other hand ensure two housings because reducing resistance when shear stress occurs the changing of the relative positions.Described
Sensitive beam 3 adopts stainless steel material, and profile is strip, and size is determined according to the range of shear stress sensor, and the one of sensitive beam 3
End can be connected with upper shell 1 by way of welding.Described grooved baffle plate 4 adopts stainless steel material, trough width thereon
It is consistent with sensitive beam, and ensure beam can along groove length direction move, grooved baffle plate can welding by way of with lower house 2
Connection.
Described sensitive beam 3 and 4 collective effect of grooved baffle plate can guarantee that the sensor is only quick to the shear stress in a direction
Sense, i.e., when sensor is subject toxDuring the shear stress of direction, sensitive beam deforms, and works as which and be subject to orthogonal direction（yDirection）Cutting should
During power, sensitive beam 3 is only moved in chute, and sensitive beam is indeformable.
As shown in figure 4, certain section in solid materialAOn shear stressτIt is suffered along the section of shear direction
It is total to shearF s With sectionAArea ratio, i.e.,
τ =F s/A （1）
Shear stress sensor of the present invention is namely based on what this ultimate principle was designed.After sensor is processed,
The area of the lower surface of the upper surface or lower house 2 of its upper shell 1 determines；After inside the sensor Transducers Embedded in Concrete, pass through
The strain variation of sensitive beam 3 in detection sensor, you can the anti-total shearing for releasing the xoncrete structure that sensor bears, by above-mentioned
Formula（1）Shear stress in the surface of sensor housing place is obtained.The strain variation amount of the sensitive beam 3 for measuring is held with sensor
Conversion coefficient between total shearing of the xoncrete structure received can be by testing indoor school by the shear stress sensor for processing
Will definitely arrive.It follows that the shear stress that obtains is measured after adopting shear stress sensor Transducers Embedded in Concrete disclosed in this invention for
Concrete average shearing stress of the area for sensor housing surfaces size.
Claims (6)
1. a kind of embedded type concrete shear stress sensor, is characterized in that：Including upper shell, lower house, described upper shell and
The interface of lower house is respectively arranged with groove in one week, is provided with for connecting the software glue-line of upper and lower casing in groove；Institute
The bottom of the upper shell stated is provided with sensitive beam, and the top of lower house is provided with grooved baffle plate, arranges on described grooved baffle plate
The one end for having chute, sensitive beam is located in the chute of grooved baffle plate；It is provided with the sensitive beam for perceiving sensitive beam deformation
Strain sensor；Described strain sensor is connected the survey for realizing sensitive beam strain by lead with follow-up measuring circuit
Amount.
2. embedded type concrete shear stress sensor according to claim 1, is characterized in that：Described sensitive beam is by stainless
Steel material is made, generally strip, and one end of sensitive beam can be connected with upper shell by way of welding.
3. embedded type concrete shear stress sensor according to claim 1 and 2, is characterized in that：Described sensitive beam is inserted
Enter.
4. embedded type concrete shear stress sensor according to claim 1, is characterized in that：Described upper shell and lower casing
Body is made up of stainless steel material, and monnolithic case is square or circular.
5. embedded type concrete shear stress sensor according to claim 1, is characterized in that：Described grooved baffle plate is not by
Rust Steel material is made, and grooved baffle plate is connected with lower house by way of welding, and the width of chute thereon is consistent with sensitive beam,
And sensitive beam bottom can be enable to move along the length direction of chute.
6. embedded type concrete shear stress sensor according to claim 1, is characterized in that：Described strain sensor
For strain ga(u)ge or optical fiber Bragg raster.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611048535.1A CN106525576B (en) | 2016-11-25 | 2016-11-25 | Embedded concrete shear stress sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611048535.1A CN106525576B (en) | 2016-11-25 | 2016-11-25 | Embedded concrete shear stress sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106525576A true CN106525576A (en) | 2017-03-22 |
| CN106525576B CN106525576B (en) | 2023-08-25 |
Family
ID=58356934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611048535.1A Active CN106525576B (en) | 2016-11-25 | 2016-11-25 | Embedded concrete shear stress sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106525576B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111829596A (en) * | 2020-07-30 | 2020-10-27 | 中国电建市政建设集团有限公司 | Soil body monitoring and sensing mechanism, system and method |
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| JPH09196835A (en) * | 1996-01-19 | 1997-07-31 | Nippon Steel Corp | Method for simulating shearing process of surface treated metal plate |
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| CN104833575A (en) * | 2015-05-16 | 2015-08-12 | 山西省交通科学研究院 | Geosynthetics anisotropism drawing test system and method |
| CN105823693A (en) * | 2016-05-04 | 2016-08-03 | 重庆大学 | Rock mass shear test box |
| CN105954117A (en) * | 2016-05-04 | 2016-09-21 | 重庆大学 | Test method for simulating gas extraction under action of shear stress |
| CN206348218U (en) * | 2016-11-25 | 2017-07-21 | 中国人民解放军61489部队 | A kind of embedded type concrete shear stress sensor |
-
2016
- 2016-11-25 CN CN201611048535.1A patent/CN106525576B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09196835A (en) * | 1996-01-19 | 1997-07-31 | Nippon Steel Corp | Method for simulating shearing process of surface treated metal plate |
| CN101713638A (en) * | 2009-12-22 | 2010-05-26 | 浙江大学 | Calibration method and device of embedded-type long-distance optical fiber sensor |
| US20110314927A1 (en) * | 2010-06-23 | 2011-12-29 | Lopez Iii Abel | Method and apparatus for testing shear fasteners used in downhole tools |
| CN102384802A (en) * | 2011-08-08 | 2012-03-21 | 大连理工大学 | Embedded type sensor of overall process shear stress of concrete dynamic damage |
| CN102410893A (en) * | 2011-08-08 | 2012-04-11 | 大连理工大学 | Embedded concrete structure power damage process space stress sensor |
| CN102323142A (en) * | 2011-09-05 | 2012-01-18 | 中国科学院武汉岩土力学研究所 | Shear box device for rock indoor direct shear test |
| CN103344508A (en) * | 2013-07-25 | 2013-10-09 | 重庆交通大学 | Device and method for testing shear characteristics of steel-soil interface in consideration of thickness of shear band |
| CN103760040A (en) * | 2014-01-24 | 2014-04-30 | 重庆大学 | Fluid-solid coupling coal petrography shear-seepage test shearing and sliding combined shearing box |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111829596A (en) * | 2020-07-30 | 2020-10-27 | 中国电建市政建设集团有限公司 | Soil body monitoring and sensing mechanism, system and method |
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| Publication number | Publication date |
|---|---|
| CN106525576B (en) | 2023-08-25 |
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